Damping of power system oscillation by a superconducting magnetic energy storage unit

✍ Scribed by Chi-Jui Wu; Chieh-Huey Wang

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 452 KB
• Volume: 22
• Category: Article
• ISSN: 0378-7796
• DOI: 10.1016/0378-7796(91)90075-x

✦ Synopsis

A superconducting magnetic energy storage (SMES) unit is used in this paper to increase the damping of a synchronous generator. The SMES unit can absorb or release power during the dynamic period, and then provide a damping torque to the generator. A proportional-integral (PI) controller is employed to control the power modulation of the SMES unit. The gains of the PI controller are determined by the least square error approach. Results from the digital simulation show that the SMES unit with the PI controller can greatly improve the system damping and the system oscillation is quickly suppressed. The stability margin is also expanded. Although the PI controller is designed at a specific operation point, it can also provide good damping at other operation points.